CY7B994V-5AXC View Datasheet(PDF) - Cypress Semiconductor
Part Name
Description
MFG CO.
'CY7B994V-5AXC' PDF : 15 Pages View PDF
RoboClock
CY7B993V
CY7B994V
Pin Configurations (continued)
100-lead BGA
1
2
3
4
5
6
7
8
9
10
1QB1 1QB0 1QA1 1QA0 QFA0 QFA1 FBKB+ VCCQ FBKA– FBKA+
A
VCCN VCCN VCCN VCCN VCCN VCCN VCCQ FBKB– FBSEL REFA+
B
GND GND GND GND GND GND VCCQ GND GND REFA–
C
D
LOCK
4F0
3F1
(3_level) (3_level)
GND
FBDS1 FBDS0 2F0
(3_level) (3_level) (3_level)
VCCQ
REFSEL
REFB–
E
4QB1
VCCN
4DS1
(3_level)
GND
3F0
4F1
(3_level) (3_level)
GND
FS
(3_level)
VCCN
REFB+
F
4QB0
VCCN
3DS1
(3_level)
GND
GND
GND
GND
FBF0
(3_level)
VCCN
2QA0
G
4QA1
2DS1
(3_level)
VCCQ
GND
GND
H
4QA0
1DS1 1DS0
(3_level) (3_level)
VCCQ
GND
GND
GND
VCCQ
1F0
(3_level)
2QA1
GND
OUTPUT
VCCQ MODE FBDIS
(3_level)
2QB0
J
4DS0 3DS0 2DS0
(3_level) (3_level) (3_level)
DIS1
VCCN VCCN
GND
INV3
(3_level)
DIS3
2QB1
K
2F1
1F1
(3_level) (3_level)
DIS2
VCCN 3QA0
3QA1
GND
3QB0
3QB1
DIS4
Pin Definitions [1]
Pin Name
I/O Pin Type
Pin Description
FBSEL
Input LVTTL Feedback Input Select: When LOW, FBKA inputs are selected. When HIGH, the FBKB
inputs are selected. This input has an internal pull-down.
FBKA+, FBKA–
FBKB+, FBKB–
Input
LVTTL/
LVDIFF
Feedback Inputs: One pair of inputs selected by the FBSEL is used to feedback the clock
output xQn to the phase detector. The PLL will operate such that the rising edges of the
reference and feedback signals are aligned in both phase and frequency. These inputs
can operate as differential PECL or single-ended TTL inputs. When operating as a
single-ended LVTTL input, the complementary input must be left open.
REFA+, REFA–
REFB+, REFB–
Input
LVTTL/ Reference Inputs: These inputs can operate as differential PECL or single-ended TTL
LVDIFF reference inputs to the PLL. When operating as a single-ended LVTTL input, the comple-
mentary input must be left open.
REFSEL
Input
LVTTL
Reference Select Input: The REFSEL input controls how the reference input is
configured. When LOW, it will use the REFA pair as the reference input. When HIGH, it
will use the REFB pair as the reference input. This input has an internal pull-down.
FS
Input 3-level Frequency Select: This input must be set according to the nominal frequency (fNOM) (see
Input Table 1).
FBF0
Input 3-level Feedback Output Phase Function Select: This input determines the phase function of
Input the Feedback bank’s QFA[0:1] outputs (see Table 3).
Note:
1. For all three-state inputs, HIGH indicates a connection to VCC, LOW indicates a connection to GND, and MID indicates an open connection. Internal termination
circuitry holds an unconnected input to VCC/2.
Document #: 38-07127 Rev. *F
Page 3 of 15
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